Nintendo, while aggressively litigious, do so to maintain the value and exclusivity of their IP.
Their games also never go on sale, and all sell really well over time, unlike many releases from other publishers.
The result is that Nintendo are able to release a solid cadence of high quality, first party games free of other forms of aggressive monetisation, maintaining the value of the games as art.
Mobile games yes, but the nintendo’s games? They are that popular? At least in my country I don’t see much of them here.
I watched a 50 year old middle-management-looking gentleman on a train in Japan pull cards in the Pokemon TCG mobile game for like a full 15 minutes when I was in Japan a few months ago. That game has a death grip there